EP1480434A1 - Verfahren und Vorrichtung zur Energieübertragung in einem drahtgebundenen Telekommunikationssystem - Google Patents

Verfahren und Vorrichtung zur Energieübertragung in einem drahtgebundenen Telekommunikationssystem Download PDF

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Publication number
EP1480434A1
EP1480434A1 EP03078766A EP03078766A EP1480434A1 EP 1480434 A1 EP1480434 A1 EP 1480434A1 EP 03078766 A EP03078766 A EP 03078766A EP 03078766 A EP03078766 A EP 03078766A EP 1480434 A1 EP1480434 A1 EP 1480434A1
Authority
EP
European Patent Office
Prior art keywords
wires
satellite
converter
input
pairs
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP03078766A
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English (en)
French (fr)
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EP1480434B1 (de
Inventor
Fabrice Frebel
Michel Paque
Paul Bleus
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Broadband Power Solutions en Abrege B P S SA
Original Assignee
CE and T INTERNATIONAL
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from EP03391001A external-priority patent/EP1480435A1/de
Application filed by CE and T INTERNATIONAL filed Critical CE and T INTERNATIONAL
Priority to EP20030078766 priority Critical patent/EP1480434B1/de
Priority to US10/991,892 priority patent/US20050118945A1/en
Priority to TW093135833A priority patent/TWI380672B/zh
Publication of EP1480434A1 publication Critical patent/EP1480434A1/de
Application granted granted Critical
Publication of EP1480434B1 publication Critical patent/EP1480434B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems

Definitions

  • the present invention relates to a transmission device of energy in a wire telecommunications system, the system comprising first and second pairs of wires (TP) of telecommunication.
  • a transmission device of energy in a wire telecommunications system typically includes a central or station basic arranged to be connected to a source of electrical energy and for connect the first and second pairs of wires.
  • the satellite or post auxiliary includes a first satellite converter. This first converter satellite comprises a first input arranged to connect the first pair of wires.
  • a remote power system is shown on page 289 of the document "No Power, No Service, No Revenue", published on the occasion of the Intelec conference of October 14-18, 2001 (Conference Publication No. 484).
  • the exchange includes a converter connected to the source on the one hand, and power or current limiters. Each of these limiters is connected to a respective pair of wires. On the satellite side, each pair of wires is connected to a satellite converter.
  • this document presents a remote power system using the principle of independence of the pairs of wires.
  • An object of the present invention is to provide a system higher efficiency remote power supply while further reducing maintenance costs, and if necessary, of the installation.
  • the device according to the invention is characterized in that the first satellite converter comprises a second input arranged to connect the second pair of wires.
  • a pair dependency system comprising a series of groups of pairs of wires, each group of pairs of wires being connected to the same satellite converter.
  • the number of converters satellites is greatly reduced, which makes maintenance easier.
  • one case particular comprising 48 pairs of wires one can for example provide 16 satellite converters which are each connected to three pairs of wires.
  • the current technology allows to foresee up to ten pairs of wires on the same converter.
  • the satellite includes a second satellite converter arranged to connect the third and fourth pairs of wires.
  • the central is arranged to connect the third and fourth pairs of wires.
  • This same central is further arranged to produce a first signal and transmit this first signal to the first and second pairs of wires, and to produce a second signal different from the first signal and transmit this second signal to the third and fourth pairs of wires.
  • a distinctive signal is thus generated for each group of pairs, which facilitates the end user easily determine which group each pair of wires belongs to.
  • means for identifying the pairs of wires are provided.
  • this is achieved by transmitting bass signals frequency, typically between 3 and 300 Hz, band not used in telecommunication.
  • the satellite converter preferably includes diode bridges.
  • Each diode bridge includes an unpolarized input connected to one of the inputs of the satellite converter and a polarized output.
  • the polarized outputs are connected to each other and are arranged to supply energy to the input stage of the satellite converter.
  • the safety of the device according to the invention is increased when it is provided impedance measuring means arranged to measure the impedance input of the satellite converter and control means connected to the measuring means and arranged to cause a cut in the supply of pairs of wires concerned if the measured input impedance (Zem) at a value different from a range of predetermined values.
  • the range of values predetermined is typically around the input impedance of the satellite converter.
  • the device comprises control means arranged to control the level of current limitation for each pair of wires.
  • control means arranged to control the level of current limitation for each pair of wires. This allows, when starting the transmission of energy, to transmit energy by limiting the level to a very low value, by example of the order of 5 milliamps. Such a current is harmless to the man who would be in contact with the pairs of wires. Then, during the "normal" operation, the current limitation level can be increased to a higher value, for example of the order of 60 milliamps.
  • satellite converters are arranged to generate an identification signal and transmit it to the exchange and the central is arranged to receive the identification signal.
  • the signal identification is the measurement of the input current of the satellite converter and the central comprises means for arranging to cause a cut in the supply of the pair of wires concerned when the difference between the current input of the satellite converter and the corresponding output current of the central reaches a predetermined threshold.
  • the central office is arranged to generate a cut-off current in one of the pairs of wires while maintaining the supply in the other pairs of wires. This maintains a supply in the system when a fault occurs in only a few pairs of wires. In a particular case where a breakdown occurs on a pair belonging to a group of six pairs, the remaining five pairs may, when cutting power supply of the pair "broken down", transporting electrical energy who would normally have gone through this pair.
  • the central comprises for each pair of wires, a respective central converter. It is however conceivable to provide a single central converter combined with current limiters.
  • a system concerned with the invention may include a station basic or central, a source of electrical energy available at the central and with nominal voltage, at least one auxiliary or satellite station to supply electrical power, and pairs of telecommunication wires which connect the central and the satellite. There can be several size exchanges different, linked or not. One or more satellites can be connected to one or more exchanges.
  • pairs of TP wires many are in reserve and therefore not used for telecommunications. Some may then be used for the transmission of electrical energy. However, it is not excluded to provide that a pair of wires is used both for the transmission of energy only for the transmission of data to the end user.
  • the device provided for this transmission of energy includes in central office 1, for each pair of wires required and free TPL used for said transmission, a controlled converter 7 arranged to receive at an input 9 connected to the energy source 3 the voltage nominal Ub and to transform this into selected voltages, including a voltage allowed Ua defined below, available at at least one output 11 connected to said free pair required TPL.
  • a controlled converter 7 can however be used to power several pairs TPL ( Figure 2) and, for this purpose, it may include several outputs 11, for example one output 11 per pair TPL, and even spare outputs 11.
  • the planned command is arranged to be able to adjust separately for each output 11 the values of voltage and current and a cut off from that voltage and current.
  • the necessary pair of wires TPL is connected to a satellite converter 13 which has an input 15, of a known input impedance Ze, and an output 17 connected in parallel with the or the outputs 17 of other satellite converters 13 to obtain the power determined necessary for use 18.
  • Control means 19 for example a microcontroller or a programmable controller, are functionally connected (or integrated) to each converter ordered 7; they are arranged to order this one so that its or each output 11 aforesaid delivers to the pair of wires necessary Corresponding TPL, when starting up, the voltages Us and Is reduced security.
  • a control unit 19 is arranged to control six central converters 7.
  • the controlled converter 7, provided for carrying out the invention can be an assembly of several blocks each comprising several independent converters 7 which can be controlled separately by control means 19 of the automaton type programmable or it can control groups of three independent converters 7 or there may be a mixture, in according to specific needs, groups of numbers different from independent converters 7 each group of which is controlled separately.
  • the control means 19 Functionally connected to the control means 19, there are means 21 for measuring the input impedance Ze of each converter satellite 13. These measuring means 21 are arranged so that, if the measured input impedance Zem does not correspond each time to the known input impedance Ze of the satellite converter 13, they cause, via the control means 19, a power cut at least the TPL pair (s) affected by a mismatch, and a suspension of the start-up.
  • the measuring means 21 are arranged so that that if this measured input impedance Zem each time corresponds to the known Ze input impedance, they cause, also through control means 19, a command of the controlled converter 7 corresponding so that its pair of TPL wires corresponding to the measures, by the associated output 11, the admitted voltage Ua, with the reduced intensity security Is and, after a security delay, with an intensity admitted the defined below.
  • the measurement of the impedance Ze can be made across the pair of wires because the impedance of this pair is considered known.
  • the device according to the invention may also include (FIG. 4) a measuring device 23, different from the measuring means 21 above, which comprises, functionally connected to each other, means 25 (25s, 25e) to measure simultaneously for each pair TPL, in the same wire F1 of this, the intensity Ims at the output 11 of the controlled converter 7 and the intensity Ime at input 15 of satellite converter 13, and means 27 for calculating the difference between the intensity Ims at output 11 and the intensity Ime at input 15.
  • a measuring device 23 different from the measuring means 21 above, which comprises, functionally connected to each other, means 25 (25s, 25e) to measure simultaneously for each pair TPL, in the same wire F1 of this, the intensity Ims at the output 11 of the controlled converter 7 and the intensity Ime at input 15 of satellite converter 13, and means 27 for calculating the difference between the intensity Ims at output 11 and the intensity Ime at input 15.
  • a these calculation means 27 are connected or functionally combined with comparison means 29 to check whether this difference is less or greater than a value typically of the order of 25 milliamps (depending on the standard IEC479-1 table DC2), and these comparison means 29 are connected functionally at means 31 arranged to cut off the supply of minus this TPL pair if said difference is greater, with a reaction of break typically less than 20 milliseconds (according to standard IEC479-1 table DC2). To this end, these switching means 31 can be connected to the converter ordered 7 or even be part of it.
  • a link 32 would be required which consumes at least one reserve wire.
  • the device of the invention can include ( Figure 5), associated with part 25e of the measuring means 25, to the location of satellite 5, a transmitting device 33 arranged to transform this measured intensity value Ime at a frequency modulated as a function of the measured value and to apply this modulated frequency to the TPL pair of son measured.
  • the frequency band audio is between 300 and 3400 Hz and that for a transmission of data starts at 25 kHz.
  • the modulated frequency transmitting the intensity Ime an unused band located between these two frequency bands and where crosstalk is not bothersome for example 8000 Hz to 8200 Hz for an intensity ranging from 0 to 200 milliamps respectively (an increase of 1 Hz for mA).
  • Figure 6 shows a common diagram for coupling the frequency modulated (FM) to the corresponding TPL wire pair.
  • Machine transmitter 33 one of the output terminals is connected directly to a wire F1 of the pair TPL while the other output terminal is connected to the other wire F2 of the pair by series connection of an FM coupling capacitor C2a (0.3 ⁇ F / 400V) and an L2a FM coupling coil of (1 mH / 200 mA).
  • a coil Decoupling L1a (1mH / 200mA) must be placed between the input terminal 15 towards this other wire F2 and the junction of the capacitor C2a and said other wire F2.
  • the input 15 usually comprises between its two terminals a capacitor C decoupling (10 ⁇ F). (The values indicated in parentheses are example).
  • an arrow F6 shows the path traversed by the FM signal produced by the transmitting device 33.
  • Figure 7 shows a preferred scheme for coupling the frequency modulated (FM) to the corresponding TPL wire pair.
  • FM frequency modulated
  • the wire F1 and the input terminal 15 of the satellite converter 13 intended for this wire F1 is connected a triple mounting in parallel of a capacitor C2b of FM decoupling (3 ⁇ F / 16V), an L1b decoupling coil (100 ⁇ H / 200 mA) and a group comprising in series the transmitting device 33 and a coupling capacitor C3b (2 ⁇ F / 16V).
  • an arrow F7 shows the path traversed by the FM signal produced by the transmitting machine 33.
  • the decoupling capacitor C of 10 ⁇ F
  • the elements L1b and C3b are of the order ten times smaller than the respective elements L1a and C2a of the circuit of the figure 6.
  • the coil L2a of figure 6 is replaced in figure 7 by the smaller C3b capacitor.
  • the method of the invention is intended to a transmission of electrical energy in a secure manner, with a power determined, in a wire telecommunications system as described above.
  • each TPL pair necessary for at least one input 15 of a satellite converter 13, of an impedance known input and which, receiving at input 15 the accepted voltage Ua, puts provision at an output 17 of a useful voltage for the satellite 5.
  • the process includes, upon start-up an energy transmission, a command from or each converter controlled 7 so that its output 11 delivers to its pair of TPL wires corresponding to reduced voltage Us and reduced current intensity Is.
  • the DC voltage Us of a few volts ( ⁇ 10 V) applied by the central converter can include the information of the pair group to which it is connected to the central converter 7.
  • An embodiment practical is to add an AC component of low amplitude of the order of a volt, the frequency of which (a few tens of hertz) is one function of the group (varying here from 1 to 14) of pairs and the address (varying here from 1 to 20) of the central converter 7, which allows, with a frequency meter ultimately, to easily identify the twisted pairs to connect to inputs from the same satellite converter 13.
  • the load or input impedance Ze we measure the load or input impedance Ze and so that it does not correspond to the input impedance Zem of a converter satellite 13 the system remains in this start-up state.
  • the measured input impedance Zem corresponds each time to the known input impedance Ze, we organize a command of the or each controlled converter 7 so that each supplies the voltage to its pair of wires admitted Ua, with reduced security intensity Is.
  • a further bet is organized en route by an order from the or from each converter ordered 7 for that each delivers to its pair of wires TPL the voltage Ua and intensity la allowed.
  • each pair of wires required TPL receives a very low safety voltage Us, without effect physiological for humans, typically of the order of 50 volts and, preferably, a very low security intensity Is, harmless to humans, typically of the order of 10 milliamps.
  • a very low safety voltage Us without effect physiological for humans
  • Is very low security intensity
  • the controlled converter 7 can then be adjusted so that, during the safety period, each pair of wires required TPL receives the accepted voltage Ua notably between ⁇ 110 and ⁇ 230 volts, and typically of the order of 160 volts, and a safety intensity Is typically of the order of 5 milliamps.
  • each central converter 7 While testing the impedance, each central converter 7 produces a signal whose frequency depends on the group number, varying here from 1 to 14, and the address of the module (here varying from 1 to 16) of which it is a part.
  • the frequency 101.24 Hz means the group of pairs 10 and the central address module 12; the last digit 4 having no meaning must to be ignored.
  • the accepted voltage Ua applied to the pair TPL is limited in intensity there for example 60 milliamps.
  • Figure 9 which shows the curve of the available power P as a function of the current la in the TPL pair, we know that this curve stops at an optimum point corresponding to the current of 60 mA and this point is unstable, a request additional fortuitous power leads to the collapse of power available. To avoid this, you must constantly maintain the current below 60 mA and this is not easy in this context.
  • the graph in Figure 10 shows the curve, of the power P depending on the stabilization voltage Ust, to be taken into account in that case. It appears that, since the operating point for the value Ust is located on a slope away from the ends of this slope, an error on the value of this stabilization voltage Ust does not have a disturbing effect on the past power and especially on the general functioning of the devices connected to the satellite converter 13.
  • the output voltage of the central converters are symmetrical with respect to the earth (for example + 160 and - 160 V), by providing high impedances 51 to 56 of values equal (for example 1 mega-Ohm). For the safety of responsible operators of the wiring of the device of the invention, it is therefore necessary to be assured that the ground connections are correct.
  • This assembly is completed by a tension measurement means 47 connected between the positive pole of the equipment 41 and the chassis 45 thereof, by through a filter circuit advantageously comprising a resistor Rf and a capacitor Cf.
  • a voltage output measured by this means of measure 47 is connected to a comparison means, known per se, for compare said measured voltage to a voltage threshold of typically 3 volts and to provide a warning signal or, preferably, a signal operable to immediately cut the power to equipment 41 in cause.
  • the measuring means 47 cannot detect more than 3 or 4 volts. Values higher means a deficiency in one or the other earth connection. A value of the order of 24 volts means an absence of at least one connection to Earth.
  • This device is also a means of monitoring the voltage drop in the cable supply and therefore a check of the adaptation of the cable section relative to the intensity of the current flowing there.
  • the device includes, when the source of energy is a source of DC voltage, means arranged to determine the impedance between the chassis of the central converters and a said terminals of the energy source, in particular the positive terminal, and generate a signal when the impedance exceeds a predetermined threshold. This signal can be used to generate an alarm or if necessary cut the power supply on the pairs of wires concerned from the chassis in question.
  • the means illustrated in figure 12 determine the impedance by measuring the voltage between the positive terminal and the chassis of the central equipment. We check that this voltage does not exceed a certain threshold, for example 4 Volts.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Radio Relay Systems (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
EP20030078766 2003-05-21 2003-11-28 Verfahren und Vorrichtung zur Energieübertragung in einem drahtgebundenen Telekommunikationssystem Expired - Lifetime EP1480434B1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP20030078766 EP1480434B1 (de) 2003-05-21 2003-11-28 Verfahren und Vorrichtung zur Energieübertragung in einem drahtgebundenen Telekommunikationssystem
US10/991,892 US20050118945A1 (en) 2003-11-28 2004-11-18 Device for transmitting electrical energy in a cabled telecommunication system
TW093135833A TWI380672B (en) 2003-11-28 2004-11-22 Device for transmitting electrical energy in a cabled telecommunication system

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP03391001A EP1480435A1 (de) 2003-05-21 2003-05-21 Verfahren und Vorrichtung zur Energieübertragung in einem drahtgebundenen Telekommunikationssystem
EP03391001 2003-05-21
EP20030078766 EP1480434B1 (de) 2003-05-21 2003-11-28 Verfahren und Vorrichtung zur Energieübertragung in einem drahtgebundenen Telekommunikationssystem

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EP1480434A1 true EP1480434A1 (de) 2004-11-24
EP1480434B1 EP1480434B1 (de) 2008-05-21

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111169413A (zh) * 2018-11-12 2020-05-19 利萨·德雷克塞迈尔有限责任公司 电能传输系统和导线系统
EP3879661A1 (de) 2020-03-10 2021-09-15 CE+T Power Luxembourg SA Sicheres und belastbares energieverteilungssystem für ein hocheffizientes mikronetz
WO2021180638A1 (en) 2020-03-10 2021-09-16 Ce+T Power Luxembourg Sa Safe and resilient energy distribution system for a highly efficient microgrid
US11588327B2 (en) 2020-03-10 2023-02-21 Ce+T Power Luxembourg Sa Safe and resilient energy distribution for a highly efficient microgrid

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4426587A (en) * 1981-07-10 1984-01-17 Societe Anonyme Dite: Compagnie Industrielle Des Telecommunications Cit-Alcatel Power supply distribution system
US4560835A (en) * 1982-07-12 1985-12-24 U.S. Philips Corporation Power supply arrangement for applying direct current to subscriber circuits
EP0696831A2 (de) * 1994-08-10 1996-02-14 York Technologies, Inc Modulare Stromversorgungsanordnung

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4426587A (en) * 1981-07-10 1984-01-17 Societe Anonyme Dite: Compagnie Industrielle Des Telecommunications Cit-Alcatel Power supply distribution system
US4560835A (en) * 1982-07-12 1985-12-24 U.S. Philips Corporation Power supply arrangement for applying direct current to subscriber circuits
EP0696831A2 (de) * 1994-08-10 1996-02-14 York Technologies, Inc Modulare Stromversorgungsanordnung

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111169413A (zh) * 2018-11-12 2020-05-19 利萨·德雷克塞迈尔有限责任公司 电能传输系统和导线系统
CN111169413B (zh) * 2018-11-12 2024-03-19 利萨·德雷克塞迈尔有限责任公司 电能传输系统和导线系统
EP3879661A1 (de) 2020-03-10 2021-09-15 CE+T Power Luxembourg SA Sicheres und belastbares energieverteilungssystem für ein hocheffizientes mikronetz
WO2021180638A1 (en) 2020-03-10 2021-09-16 Ce+T Power Luxembourg Sa Safe and resilient energy distribution system for a highly efficient microgrid
US11588327B2 (en) 2020-03-10 2023-02-21 Ce+T Power Luxembourg Sa Safe and resilient energy distribution for a highly efficient microgrid

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